The positron beam at the stuttgart pelletron accelerator and its applications to? +? positron lifetime measurements

1987 ◽  
Vol 43 (4) ◽  
pp. 261-267 ◽  
Author(s):  
W. Bauer ◽  
K. Maier ◽  
J. Major ◽  
H. -E. Schaefer ◽  
A. Seeger ◽  
...  
Keyword(s):  
Positron Lifetime ◽  
Positron Beam ◽  
Lifetime Measurements ◽  
Pelletron Accelerator

scholarly journals Toward a European Network of Positron Laboratories

Nukleonika ◽  
2015 ◽  
Vol 60 (4) ◽  
pp. 733-739 ◽  
Author(s):  
Grzegorz P. Karwasz ◽  
Roberto S. Brusa ◽  
Werner Egger ◽  
Olga V. Ogorodnikova
Keyword(s):  
Water Vapor ◽  
Positron Lifetime ◽  
Complex Dynamics ◽  
Positron Beam ◽  
Doppler Broadening ◽  
European Network ◽  
Lifetime Measurements ◽  
Positron Beams ◽  
Positron Lifetimes ◽  
Material Studies

AbstractSome applications of controlled-energy positron beams in material studies are discussed. In porous organic polysilicates, measurements of 3γ annihilation by Doppler broadening (DB) method at the Trento University allowed to trace pore closing and filling by water vapor. In silicon coimplanted by He+and H+, DB data combined with positron lifetime measurements at the München pulsed positron beam allowed to explain Si blistering. Presently measured samples of W for applications in thermonuclear reactors, irradiated by W+and electrons, show vast changes of positron lifetimes, indicating complex dynamics of defects.

Nondestructive positron-lifetime measurements during fatigue of austenitic stainless steel using a mobile positron beam

2000 ◽  
Vol 77 (12) ◽  
pp. 1911 ◽  
Author(s):  
Andrea Barbieri ◽  
Sabine Hansen-Ilzhöfer ◽  
Achim Ilzhöfer ◽  
Uwe Holzwarth
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Positron Lifetime ◽  
Positron Beam ◽  
Lifetime Measurements

Thermal vacancies and positron-lifetime measurements inFe76.3Al23.7

1990 ◽  
Vol 41 (17) ◽  
pp. 11869-11874 ◽  
Author(s):  
H.-E. Schaefer ◽  
R. Würschum ◽  
M. Sǒb ◽  
T. Zák ◽  
W. Z. Yu ◽  
...  
Keyword(s):  
Positron Lifetime ◽  
Lifetime Measurements

Positron Lifetime Measurements of Delta Doped MBE Grown Silicon Structures

1994 ◽  
Vol 175-178 ◽  
pp. 213-216
Author(s):  
J. Störmer ◽  
P. Willutzki ◽  
D.T. Britton ◽  
Werner Triftshäuser ◽  
W. Kiunke ◽  
...  
Keyword(s):  
Positron Lifetime ◽  
Lifetime Measurements ◽  
Silicon Structures

Positron lifetime measurements inn- andp-type silicon

1974 ◽  
Vol 4 (3) ◽  
pp. 271-272 ◽  
Author(s):  
M. Dorikens ◽  
C. Dauwe ◽  
L. Dorikens-Vanpraet
Keyword(s):  
Positron Lifetime ◽  
Lifetime Measurements ◽  
Type Silicon

Positron state and Lifetime in C60/C70 Fullerites

1992 ◽  
Vol 270 ◽  
Author(s):  
H.-E. Schaefer ◽  
M. Forster ◽  
R. WÜrschum ◽  
F. Banhart
Keyword(s):  
Electron Microscopy ◽  
Hydrostatic Pressure ◽  
High Resolution ◽  
Positron Annihilation ◽  
Positron Lifetime ◽  
High Resolution Electron Microscopy ◽  
Lattice Defects ◽  
Lifetime Measurements ◽  
Resolution Electron ◽  
Positron State

ABSTRACTThe present paper reports on positron lifetime measurements on Ceo/C 70 fullerite powder as a function of temperature and quasi-hydrostatic pressure in order to give an estimate of the positron annihilation site in the fullerite lattice. A single-component positron lifetime of 402 ps is observed which significantly decreases under quasi-hydrostatic pressure. From this and the soft intermolecular properties of the fullerites one can conclude that the positron is annihilated rather in the intermolecular space than inside the fullerene molecules. However, positron trapping at lattice defects, which are observed by high-resolution electron microscopy, cannot be ruled out.

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